Sweep Stale Calls Endpoint

Close call rows and web sessions that outlived their room.

Until now the only thing that closed a stranded row was somebody opening the panel's call list, because the sweep lived inside that read path. A call cut off mid-conversation — an agent restart, a browser that died without reporting, a missed webhook — therefore showed as "in progress" for as long as nobody looked, and for a browser room it did worse than look wrong: idx_web_sessions_one_open allows a single open session per interpreter, so one stranded row made that address unusable.

Everything here is time-guarded and idempotent, so running it every few minutes is safe.